Yeri of Red Velvet 블루버스데이 OST Part.4 The series tells the story of Oh Ha-Rin (Kim Ye-rim), who travels to the past through mysterious photos left by her first love, Ji Seo-Jun (Yang Hong-seok). They had been close friends since they were 8 years old, but he died by suicide on her birthday 10 years ago. Color Coded Lyrics by BRelaxion Please Like and Subscribe my youtube channel. THANK YOU :)